The TPS54140ADGQ is a 42V 1.5A Step-down Converter with an integrated high-side MOSFET and Eco-mode?. Current-mode control provides simple external compensation and flexible component selection. A low ripple-pulse skip mode reduces the no-load, regulated output supply current to 116μA. Using the enable pin, shutdown supply current is reduced to 1.3μA. Under-voltage lockout is internally set at 2.5V, but can be increased using the enable pin. The output voltage start-up ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 94 to 107% of its nominal voltage. A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.
- 200mR High-side MOSFET
- High efficiency at light loads with a pulse-skipping Eco-mode?
- Tighter enable threshold than TPS54140 for more accurate UVLO voltage
- Adjustable UVLO voltage and hysteresis
- 116μA Operating quiescent current
- 1.3μA Shutdown current
- 100kHz to 2.5MHz Switching frequency
- Synchronizes to external clock
- Adjustable slow start/sequencing
- UV and OV power-good output
- 0.8V Internal voltage reference
- Green product and no Sb/Br
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